Make Sure Your Phone Meets the Recommended System Requirement
CPU : 8-Cores Snapdragon 720G or better
RAM : 8gb Ram(the Native Ram Without the Plus Memory)
Storage : 128gb (50gb Free)
Try Setting Up Vectras VM Properly From Here
Remember That You can Never Have a Native Performance Because There is No x86_64 KVM Available for arm64
and That You Are Running a Full OS as a Virtual Machine or an App Which Only Takes Around 20% of Your
Phone Resources
Try Using a Light Rom Like (7 or Lower) and Light Versions of Linux